/Engine/Source/Editor/MovieSceneTools/Public/Channels/ConstraintChannelCurveModel.h
FKeyBarCurveModel.
virtual void BuildContextMenu ( const [FCurveEditor](API\Editor\CurveEditor\FCurveEditor) & CurveEditor, [FMenuBuilder](API\Runtime\Slate\Framework\MultiBox\FMenuBuilder) & MenuBuilder, [TOptional](API\Runtime\Core\IO\TOptional)< [FCurvePointHandle](API\Editor\CurveEditor\FCurvePointHandle) > ClickedPoint )